Guard Kelechi Osemele #70 of the Oakland Raiders points up to the sky during his team’s game against the San Diego Chargers at Qualcomm Stadium on December 18, 2016 in San Diego, California. (Photo by Donald Miralle/Getty Images)

The Raiders (2-10) host the Steelers (7-4-1) Sunday at 1:25 p.m. at the Coliseum.

Osemele, who earlier this season missed two games with a knee injury, sat out practice with a toe injury after being limited the previous two days.

Martin, the Raiders’ leading rusher, was a full participant but in a walkthrough setting and hasn’t been cleared by the medical staff to play after sustaining a knee injury against Kansas City.

Like Osemele and Martin, Roberts, the Raiders’ slot receiver, was listed as questionable but his availability is in the hands of doctors since he has yet to clear concussion protocol.

If Osemele can’t play the next man up is reserve Jon Feliciano. Martin’s absence would be filled by Jalen Richard, DeAndre Washington, and possibly C.J. Anderson, the former Denver running back who was signed this week.

Whether Anderson plays or not will likely be determined on how the coaching staff feels he will be at picking up blitzes. The Raiders are confident in Anderson as a ball carrier.

“They blitz more than any team in the league,” Raiders coach Jon Gruden said. ‘It’s a challenge for a running back because those guys are very, very involved in these pickups.”

— Ryan Switzer, the wide receiver/return specialist acquired by the Raiders from Dallas in exchange for Jihad Ward and then dealt to Pittsburgh, has carved out a role with the Steelers.

Switzer is averaging 8.5 yards per punt return, 19.6 yards per kickoff return and has 29 receptions for 223 yards and a touchdown as a slot receiver.

“He’s been a real developing asset for us,” Steelers coach Mike Tomlin told Bay Area reporters by conference call. “He kind of got on the moving train. He spent a majority of the off-season (with the Raiders) so it’s been a developing process but with each week he’s been increasingly significant.”

— Members of the Marine Corps reserve will be stationed outside the Coliseum in several areas to accept new unwrapped toys and monetary donations for the Toys for Tots program.

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